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RCD and Minimum Insulation Readings
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<blockquote data-quote="Doc Hudson" data-source="post: 342218" data-attributes="member: 1607"><p>Because 1 MegOhm is 1,000,000 ohms, as Andy said 7666.6ohms would be 0.007666 MegOhms. But if your meter only shows two decimal places on the MegOhms scale 7666.6 ohms would actually show as 0.00Megohms, or Zero Meg. Some 'electricians' get confused thinking that a zero reading when doing an insulation resistance test is a short circuit, but as it is on the MegOhms scale Zero meg results could still be over 9000ohms, which is no where near a short circuit..</p><p></p><p>Doc H.</p></blockquote><p></p>
[QUOTE="Doc Hudson, post: 342218, member: 1607"] Because 1 MegOhm is 1,000,000 ohms, as Andy said 7666.6ohms would be 0.007666 MegOhms. But if your meter only shows two decimal places on the MegOhms scale 7666.6 ohms would actually show as 0.00Megohms, or Zero Meg. Some 'electricians' get confused thinking that a zero reading when doing an insulation resistance test is a short circuit, but as it is on the MegOhms scale Zero meg results could still be over 9000ohms, which is no where near a short circuit.. Doc H. [/QUOTE]
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